ABB Miniature Circuit Breakers
ABB miniature circuit breakers (MCBs) are engineered to provide reliable, efficient circuit protection across a wide range of electrical installations. Designed for industrial, commercial, and residential applications, ABB MCBs safeguard equipment and wiring from overloads, short circuits, and other fault conditions.
When excessive current is detected - whether from a malfunctioning device or an unexpected load - ABB MCBs act instantly to disconnect power and prevent damage. Their robust design ensures fast, precise operation and long-term durability, helping maintain safety and uptime across all system environments.
The ABB System pro M compact series exemplifies this innovation, combining high breaking capacity with space-saving design. Even under heavy fault loads, these circuit breakers maintain stable performance and minimize internal arcing for enhanced safety and reliability.
Whether you need single-pole or four-pole breakers rated from 48 V to 100 V, RSP Supply carries the full range of ABB miniature circuit breakers to fit your specific requirements.
Shop ABB MCBs at RSP Supply today for trusted, high-performance circuit protection built to ABB’s global quality standards.
More Information about ABB Miniature Circuit Breakers
DIN rail mounting of ABB miniature circuit breakers is straightforward and secure in electrical panels. These circuit breakers are fitted with a combination of thermal-magnetic trip units that keep circuits safe from both overloads and short circuits. The delayed thermal tripping mechanism responds to a significant and sustained increase in current over the nominal or rating current of the circuit, and the magnetic tripping mechanism part of the trip unit responds to a very high, short burst of current that amounts to many times the rating current of the circuit.
Not only are ABB MCBs tough and durable, they also excel in poor conditions when shock and vibration may cause other MCBs to fail. They have a "tough on" and "tough off" mode of operation that does not waver, regardless of some of the extreme conditions under which they are tested, with an attention to failure that can be as illuminating as their overall success in these conditions.
FAQS
Do tripping mechanisms ensure electrical safety by protecting electrical installations and providing overload protection and short circuit protection?
Yes, tripping mechanisms in circuit breakers ensure electrical safety by protecting electrical installations through the provision of overload protection and short circuit protection, interrupting the current flow when abnormal conditions are detected.
Trip Curve Basics Part 1
There are two critical elements in miniature circuit beakers.
Bimetal strip
This strip has two dissimilar metals attached to one another. When a prolonged overcurrent occurs, these metals begin to bend. Because the metals are different, the rate at which they bend is different, therefore causing the strip to bend. If this bending occurs long enough, the bending strip will disrupt the electrical contacts inside the breaker, causing it to trip.
Coil or solenoid
The coil or solenoid is designed for larger overcurrent events like a short circuit or lightning strike. When a large overcurrent event occurs, the plunger in the solenoid is actuated, thereby tripping the breaker.
What is a trip curve?
It is both the prolonged overcurrent protection from the bimetal strip and the higher spikes in voltage and current protection from the solenoid that make up the circuit breakers trip curve. How fast or slow these events occur determines the shape of the curve. A trip curve is simply a graphical representation of the expected behavior of a circuit protection device, in this case, a circuit breaker.
This graphical representation looks at two separate pieces of data to provide the information needed to understand when a particular breaker will trip. The first is time, more specifically, the time the circuit breaker experiences a certain amount of overcurrent. The second is the amount of current. In this case, how much more current is passing through the breaker than the protection device is actually rated for.